Orpheus
10Score over 15,000 points in the Campaign meta-game on the eighth mission.
Unlocked: 29 Apr 2017 20:00:39
Ranger
10Score over 50,000 points in the Campaign meta-game on the sixth mission.
Unlocked: 29 Apr 2017 19:34:08
Advance to the Spartan Officer ranks (Online).
Unlocked: 08 Apr 2017 19:17:17
Askar
10Score over 15,000 points in the Campaign meta-game on the fourth mission.
Unlocked: 09 Nov 2009 20:59:31
Destroy an enemy vehicle with equipment in a ranked playlist or in campaign.
Unlocked: 14 Oct 2009 18:41:02
Board the same vehicle within 10 seconds after being boarded in any free for all playlist (Online).
Unlocked: 14 Oct 2009 18:14:08
Splatter an enemy with the mongoose in a ranked free for all playlist (Online).
Unlocked: 07 Oct 2009 18:56:37
Vanguard
10Score over 50,000 points in the Campaign meta-game on the seventh mission.
Unlocked: 25 Sep 2009 15:41:00
Destroy a vehicle that has three enemies in it in a ranked playlist or in campaign.
Unlocked: 25 Sep 2009 15:24:00
Exterminator
10Score over 15,000 points in the Campaign meta-game on the fifth mission.
Unlocked: 25 Sep 2009 13:55:13
Reclaimer
10Score over 15,000 points in the Campaign meta-game on the final mission.
Unlocked: 25 Sep 2009 12:50:57
Overkill
5Kill 4 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Unlocked: 24 Sep 2009 15:14:51
Score a Double Kill with a single spartan laser shot in a ranked free for all playlist (Online).
Unlocked: 24 Sep 2009 15:03:57
Score 5 grenade sticks in any ranked free for all playlist (Online).
Unlocked: 24 Sep 2009 14:54:41
Kill 10 enemies without dying in any ranked free for all playlist (Online).
Unlocked: 24 Sep 2009 14:50:23
Score a Triple Kill with the sword in a ranked free for all playlist (Online).
Unlocked: 24 Sep 2009 14:49:28
MVP
5Earn the MVP in any ranked playlist (Online).
Unlocked: 07 Feb 2009 11:21:39
Cavalier
10Score over 15,000 points in the Campaign meta-game on the third mission.
Unlocked: 09 Oct 2008 19:48:00
Demon
10Score over 15,000 points in the Campaign meta-game on the second mission.
Unlocked: 09 Oct 2008 19:28:57
Kill 5 enemies by melee or assassination in a ranked free for all playlist (Online).
Unlocked: 26 Sep 2008 12:48:47
Kill 3 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Unlocked: 26 Sep 2008 12:13:45
Finish the Campaign on Legendary (unlocks achievements for Normal and Heroic, if not earned).
Unlocked: 26 Sep 2008 11:13:54
Finish the Campaign on Heroic (unlocks achievement for Normal, if not earned).
Unlocked: 26 Sep 2008 10:24:57
Finish the Campaign on Normal.
Unlocked: 26 Sep 2008 10:24:56
Return
50Finish the final mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 26 Sep 2008 10:18:40
The Key
40Finish the eighth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 26 Sep 2008 09:35:38
Last Stand
40Finish the seventh mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 26 Sep 2008 08:42:51
Tilt
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 26 Sep 2008 07:37:44
Thunderstorm
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 26 Sep 2008 07:23:45
Marathon Man
40Locate and access all Terminals in the Campaign.
Unlocked: 25 Sep 2008 22:06:50
Kill 10 enemies with headshots in a ranked free for all playlist or in campaign.
Unlocked: 25 Sep 2008 21:16:52
Destroy an enemy banshee with the spartan laser or missile pod in a ranked playlist or in campaign.
Unlocked: 25 Sep 2008 15:40:17
Refuge
30Finish the sixth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 25 Sep 2008 15:35:18
Assault
30Finish the fourth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 25 Sep 2008 14:46:28
Famine
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 24 Sep 2008 17:34:57
Cleansing
30Finish the fifth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 30 Aug 2008 15:35:00
Fog
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 30 Aug 2008 15:08:50
Iron
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 30 Aug 2008 09:22:12
Catch
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 04 Aug 2008 10:04:02
UNSC Spartan
15Earn your Sergeant rating to be recognized as a true Spartan (Online).
Unlocked: 04 Aug 2008 08:07:26
The Road
20Finish the third mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 03 Aug 2008 21:13:12
Tough Luck
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 03 Aug 2008 20:19:40
Mythic
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 02 Aug 2008 18:00:57
Graduate
10Earn 5 EXP or finish 10 games to complete the requirements for basic training (Online).
Unlocked: 24 May 2008 15:29:31
Holdout
20Finish the second mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 23 May 2008 19:27:40
Black Eye
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 23 May 2008 18:47:24
Landfall
20Finish the first mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 23 May 2008 18:44:43
Kill 5 enemies with the needler in a ranked free for all playlist or in campaign.
Unlocked: 23 May 2008 18:17:13
Guerilla
10Score over 15,000 points in the Campaign meta-game on the first mission.
Unlocked: Offline
On a Legendary map, get 3 Oddball melee kills during any ranked or social match.
Unlocked: 01 Apr 2017 18:35:23
Road Rage
25On a Legendary map, get 5 Warthog chaingun kills during any ranked or social match.
Unlocked: 11 Oct 2009 14:31:04
Flag Dropped
25On a Legendary map, get 2 flag carrier kills during any ranked or social match.
Unlocked: 11 Oct 2009 14:28:17
Defend This
50On a Legendary map, get a flag melee kill during any ranked or social match.
Unlocked: 11 Oct 2009 14:26:57
On a Legendary map, get a Splatter Spree during any ranked or social match.
Unlocked: 11 Oct 2009 14:12:38
On a Legendary map, get 3 assassinations during any ranked or social match.
Unlocked: 11 Oct 2009 14:04:22
On a Legendary map, get two Double Kills during any ranked or social match.
Unlocked: 11 Oct 2009 13:59:53
Hammer Time
25On Assembly, get 5 Hammer kills during any ranked or social match.
Unlocked: 01 Apr 2017 20:17:06
On a Mythic map, kill 2 Zombies during any ranked or social match.
Unlocked: 01 Apr 2017 18:22:50
Post Mortem
25On Orbital, get 2 Death From the Grave medals during any ranked or social match.
Unlocked: 27 Mar 2017 19:38:41
On a Mythic map, get a Perfection medal during any ranked or social match.
Unlocked: 27 Mar 2017 19:15:22
On a Mythic map, get a Bulltrue medal during any ranked or social match.
Unlocked: 27 Mar 2017 18:40:26
Killtacular
25On a Mythic map, get a Killtacular during any ranked or social match.
Unlocked: 27 Mar 2017 18:34:36
On a Mythic map, infect 2 humans during any ranked or social match.
Unlocked: 11 Oct 2009 16:33:04
On a Mythic map, get an Extermination during any ranked or social match.
Unlocked: 11 Oct 2009 13:59:55
On a Mythic map, get a Killjoy medal during any ranked or social match.
Unlocked: 11 Oct 2009 13:57:08
On Assembly, find the hidden skull.
Unlocked: 14 Apr 2009 14:36:10
On Orbital, find the hidden skull.
Unlocked: 14 Apr 2009 14:32:33
Tank Dropper
25On any Mythic map, get a kill on another player while in monitor mode.
Unlocked: 14 Apr 2009 14:31:51
On Sandbox, find the hidden skull.
Unlocked: 14 Apr 2009 14:22:46
On Heretic, get a Sword Spree during any ranked or social match.
Unlocked: 27 Mar 2017 17:50:45
Ghost Patrol
25On Longshore, get 3 kills with a Ghost during any ranked or social match.
Unlocked: 11 Oct 2009 14:07:52
Pull
25On Citadel, get a Shotgun Spree during any ranked or social match.
Unlocked: 11 Oct 2009 13:55:23
On Heretic, find the hidden skull.
Unlocked: 11 Oct 2009 13:52:51
On Longshore, find the hidden skull.
Unlocked: 11 Oct 2009 13:48:16
On Citadel, find the hidden skull.
Unlocked: 11 Oct 2009 13:46:15
Get to the rank of Lieutenant in any playlist in the new EXP progression system.
Unlocked: 08 Apr 2017 19:17:17
Find all the hidden skulls on the Mythic maps.
Unlocked: 11 Oct 2009 13:52:53
Enter into any ranked or social playlist with 7 EXP on the 7th of the month.
Unlocked: 07 Oct 2009 18:34:05
After 9/25/08, complete Halo on 4-player Legendary LIVE co-op, with Iron, and everyone in Ghosts.
Unlocked: 11 Oct 2008 13:57:05